Step height 6 mm for sheet thicknesses of 3-9 mm. 1623 (length approx. 500 mm) 121, (length approx. 600 mm) 427 (length approx. 750 mm) Step height 8 mm for sheet thicknesses of 5-11 mm 1300 (length approx. 500 mm) 1457 (length approx. 600 mm) 1447 (length approx. 750 mm) Step height 10 mm for sheet thickness 7-13 mm 717 (length approx. 500 mm) 1510 (length approx. 600 mm) 1217 (length approx. 750 mm)